Start on simplifying generateGeometry() overrides

gm/convexpolyeffect.cpp

Index: gm/convexpolyeffect.cpp
diff --git a/gm/convexpolyeffect.cpp b/gm/convexpolyeffect.cpp
index 60b73c571d97a067d5b566d2ed0b88570dd65212..cd9b3d10e55b2efbc56efa0a49b6bf5aa2aaae67 100644
--- a/gm/convexpolyeffect.cpp
+++ b/gm/convexpolyeffect.cpp
@@ -17,7 +17,6 @@
 #include "GrContext.h"
 #include "GrDefaultGeoProcFactory.h"
 #include "GrPathUtils.h"
-#include "GrResourceProvider.h"
 #include "GrTest.h"
 #include "GrTestBatch.h"
 #include "SkColorPriv.h"
@@ -53,47 +52,24 @@ private:
     }
 
     void onGenerateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) override {
-        SkAutoTUnref<const GrIndexBuffer> indexBuffer(
-            batchTarget->resourceProvider()->refQuadIndexBuffer());
-
         size_t vertexStride = this->geometryProcessor()->getVertexStride();
-        const GrVertexBuffer* vertexBuffer;
-        int firstVertex;
-
-        void* vertices = batchTarget->vertexPool()->makeSpace(vertexStride,
-                                                              kVertsPerCubic,
-                                                              &vertexBuffer,
-                                                              &firstVertex);
-
-        if (!vertices || !indexBuffer) {
-            SkDebugf("Could not allocate buffers\n");
+        SkASSERT(vertexStride == sizeof(SkPoint));
+        QuadHelper helper;
+        SkPoint* verts = reinterpret_cast<SkPoint*>(helper.init(batchTarget, vertexStride, 1));
+        if (!verts) {
             return;
         }
 
-        SkASSERT(vertexStride == sizeof(SkPoint));
-        SkPoint* verts = reinterpret_cast<SkPoint*>(vertices);
-
         // Make sure any artifacts around the exterior of path are visible by using overly
         // conservative bounding geometry.
         fGeometry.fBounds.outset(5.f, 5.f);
         fGeometry.fBounds.toQuad(verts);
 
-        GrDrawTarget::DrawInfo drawInfo;
-        drawInfo.setPrimitiveType(kTriangleFan_GrPrimitiveType);
-        drawInfo.setVertexBuffer(vertexBuffer);
-        drawInfo.setStartVertex(firstVertex);
-        drawInfo.setVertexCount(kVertsPerCubic);
-        drawInfo.setStartIndex(0);
-        drawInfo.setIndexCount(kIndicesPerCubic);
-        drawInfo.setIndexBuffer(indexBuffer);
-        batchTarget->draw(drawInfo);
+        helper.issueDraws(batchTarget);
     }
 
     Geometry fGeometry;
 
-    static const int kVertsPerCubic = 4;
-    static const int kIndicesPerCubic = 6;
-
     typedef GrTestBatch INHERITED;
 };